For the ultimate in product flow control, the zero-pressure accumulating conveyor oners complete selectivity over numerous operational functions. This air-controlled/chain powered live roller conveyor is designed primarily for zero- pressure accumulation, and can accommodate a wide range of product sizes and weights (4-100 Ibs/ft) without any build-up of line pressure. Its simple design is virtually maintenance-free, because it involves no complicated linkages and requires no adjustments for varying load weights. The rugged roller chain assures positive drive even under heavy loads; the non-metallic clutch assemblies are unusually quiet and vibration-free.